function checkUserEmail(obj){
	var error_msg = "";
	reg =  /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;
	if(obj.value == ""){
		error_msg = "请输入邮箱";
	}else if(! reg.test(obj.value)){
		error_msg = "邮箱格式错误";
	}
	
}